Hi! Could you please tip how to properly name object construction approach where public proprieties values are being set on object creation? For example, SqlCommand command = new SqlCommand { Connection = connection, CommandType = CommandType.Text }; ...
Below javascript has different effect in different browsers. document.write(this.location.constructor); document.write("<br/>"); document.write(this.constructor); document.write("<br/>"); In Chrome, the page has function Location() { [native code] } function DOMWindow() { [native code] } In Firefox, the page has [object Location]...
Hallo, I have a question about inheritance in Java. I have two classes A and B, and class B, inherits from A: public class A { public A() { System.out.println("Hi!"); } } public class B extends A { public B() { System.out.println("Bye!"); } public static void main(String[] args) { ...
I'm currently modifying a class that has 9 different constructors. Now overall I believe this class is very poorly designed... so I'm wondering if it is poor design for a class to have so many constructors. A problem has arisen because I recently added two constructors to this class in an attempt to refactor and redesign a class (SomeMa...
Why the following example prints "0" and what must change for it to print "1" as I expected ? #include <iostream> struct base { virtual const int value() const { return 0; } base() { std::cout << value() << std::endl; } virtual ~base() {} }; struct derived : public base { virtual const int value() const { ...
I am creating an abstract class. I want each of my derived classes to be forced to implement a specific signature of constructor. As such, I did what I would have done has I wanted to force them to implement a method, I made an abstract one. public abstract class A { abstract A(int a, int b); } However I get a message saying the a...
Hi, I have a class made up of several fields, and I have several constructors. I also have a constructor that doesn't take any parameters, but when I try to use it: int main { A a; } The compiler generates an error, while if I use it like this: int main { A a(); } It's ok. What's that? Thank you ...
I wish to declare a new dojo class inheriting from an existing dojo class, but with my own choice of default values for the class's properties. (The user can still override those values.) I am declaring my own version of the dijit.form.FilteringSelect such that: the hasDownArrow property defaults to false (rather than the standard tr...
I have a Foo object, and a std::list holding instances of it. My problem is that when I add a new instance to the list, it first calls the ctor but then also the dtor. And then the dtor on another instance (according to the this pointer). A single instance is added to the list but since its dtor (along with its parents) is called, the o...
Hello everyone, here is a short question : Using C++, how can I call a constructor on a memory region that is already allocated ? ...
Given a struct like this: public struct SomeStruct { public SomeStruct(String stringProperty, Int32 intProperty) { this.StringProperty = stringProperty; this.IntProperty = intProperty; } public String StringProperty { get; set; } public Int32 IntProperty { get; set; } } Of course, a compiler error ...
I started off by drafting a question: "What is the best way to perform unit testing on a constructor (e.g., __construct() in PHP5)", but when reading through the related questions, I saw several comments that seemed to suggest that setting member variables or performing any complicated operations in the constructor are no-nos. The const...
I'm trying to figure out the correct syntax to use the pipe operator |> into the creation of an object. Currently I'm using a static member to create the object and just piping to that. Here is the simplified version. type Shape = val points : Vector[] new (points) = { points = points; } static member create(poi...
Hello, I was thinking how much code one should put in constructors in Java? I mean, very often you make helper methods, which you invoke in a constructor, but sometimes there are some longer initialisation things, for example for a program, which reads from a file, or user interfaces, or other programs, in which you don't initialise onl...
I have two classes, one derived from the other and both have parametrized constructors. I want to call the constructor in both classes when I instantiate the derived class. So my question is: what is the syntax to pass parameters to both base and derived classes from the calling code? I tried something like this but it does not compile...
Is there a way to have some kind of default constructor (like C++ one) for C user types defined with a structure? I already have a macro which works like fast initializer (like pthread_mutex's one) but i wanted to know if you can by any chance have some (or all) fields of a struct filled at declaration. For instance with the pthread_mu...
Is there a way to cause an error if every constructor doesn't initialize a given member? Maybe something with const? I want this because I have a pile of code where I'm getting errors as a result of incorrectly computing member values. What I'd really like to do is strip out the whole mess and follow the compiler's lead while redoing it...
I'm working on C++ framework and would like to apply automatic memory management to a number of core classes. So far, I have the standard approach which is class Foo { public: static shared_ptr<Foo> init() { return shared_ptr<Foo>(new Foo); } ~Foo() { } protected: Foo() { } }; // Example of use shared_...
I've: function Obj1(param) { this.test1 = param || 1; } function Obj2(param, par) { this.test2 = param; } now when I do: Obj2.prototype = new Obj1(44); var obj = new Obj2(55); alert(obj.constructor) I have: function Obj1(param) { this.test1 = param || 1; } but the constructor function has been Obj2... why that? O...
Is there any practical difference in terms of effects on the component model between: class MyComponent : Component { public MyComponent() { InitializeComponent(); } public MyComponent(IContainer container) { container.Add(this); InitializeComponent(); } } and: class MyComponent : Component { ...